Troubleshooting | Symptom Charts/ Video - 49 |
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Screen is black, there is no startup chime, and drive does not operate, but fan is running and power LED is lit
1Power Macintosh G4 (PCI Graphics): Check the jumper block at J25. Make sure the jumper is the correct color for the processor type, includes all required inner metal clips, and is installed in the correct direction. See “Processor Module” in Take Apart for more information.
2Check all video cable/card connections and connector pins.
3Power Macintosh G4 (PCI Graphics): Reset the Cuda chip. See “Resetting the Cuda Chip” in this chapter.
4Reset the logic board:
•Power Mac G4 (all models except PCI Graphics): Refer to “Resetting the PMU on the Logic Board” in this chapter.
•Power Macintosh G4 (PCI Graphics): Refer to “Resetting the PCI Logic Board” in this chapter.
5Reseat the video card.
6Reseat the processor module.
7Replace the processor module.
8Replace the logic board.
